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A method for preparing cyclohexanol and cyclohexanone based on a multi-layer double-loop flow guide tube bubbling reactor

The technology of bubbling reactor and guide tube is applied in chemical instruments and methods, chemical methods for reacting liquids and gaseous media, preparation of carbon-based compounds, etc. Selectivity decline, etc.

Active Publication Date: 2021-02-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Increasing the oxidation conversion rate of cyclohexane can reduce the evaporation of cyclohexane, but increasing the oxidation conversion rate of cyclohexane will lead to a decrease in the selectivity of the target product, resulting in an increase in material consumption, and reducing the oxidation conversion rate of cyclohexane can increase the yield of the target product. Selectivity, but the proportion of cyclohexane in the product is higher, and more cyclohexane needs to be distilled

Method used

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  • A method for preparing cyclohexanol and cyclohexanone based on a multi-layer double-loop flow guide tube bubbling reactor
  • A method for preparing cyclohexanol and cyclohexanone based on a multi-layer double-loop flow guide tube bubbling reactor
  • A method for preparing cyclohexanol and cyclohexanone based on a multi-layer double-loop flow guide tube bubbling reactor

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Embodiment 1

[0064] See figure 1 . The reactor shell 1 of the multi-layer double-loop flow guide tube bubble reactor is set with a multi-layer double-circle flow guide tube. In this embodiment, it is a two-layer double-loop flow guide tube, including the inner layer guide tube 3 located in the center. And the outer double-ring guide tube 2 located on the outside, the two-layer double-ring flow guide tube is coaxially arranged with the reactor shell 1, and the diameter is different, and the reactor shell 1 is divided into a three-stage annular area 4, and the double-ring The height of the flow guiding cylinder decreases step by step along the innermost double-circular flow guiding cylinder to the outermost layer of the double-circular flow guiding cylinder. There is a gap 10 between the bottom of the inner layer double-loop flow guide tube 3 and the bottom of the outer layer double-loop flow guide tube 2 and the bottom of the reactor shell 1, so that the three-stage annular area can pass t...

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Abstract

The invention discloses a method for preparing cyclohexanol and cyclohexanone based on a multi-layer annular flow guide cylinder bubbling reactor. The method comprises the following steps: in a multi-layer annular flow guide cylinder bubbling reactor, oxidizing cyclohexane with an oxygen-containing gas to generate a cyclohexyl hydroperoxide-containing oxidation liquid, extracting an oxidation liquid with a strong base solution so as to obtain a cyclohexyl hydroperoxide-containing alkali water phase and a cyclohexane organic phase, performing a decomposition reaction on the cyclohexyl hydroperoxide-containing alkali water phase in the presence of a high-melting point solvent, performing sedimentation separation on a decomposition liquid, distilling the cyclohexane organic phase so as to obtain a mixture of cyclohexanol and cyclohexanone, and feeding back the extracted cyclohexane solution to the cyclohexane oxidation reaction process. By adopting the method, the oxidation selectivity and the reaction efficiency of the cyclohexane can be greatly improved, and the cyclohexane distillation energy consumption can be reduced.

Description

technical field [0001] The invention relates to a method for preparing cyclohexanol and cyclohexanone, in particular to a method for preparing cyclohexanol and cyclohexanone by oxidizing cyclohexane with oxygen-containing gas based on a multi-layer double-circulation flow guide tube bubbling reactor, belonging to KA oil preparation technical field. Background technique [0002] The oxidation of cyclohexane to prepare cyclohexanol and cyclohexanone is usually to oxidize cyclohexane with a gas containing molecular oxygen, first to generate a cyclohexane oxidation solution containing cyclohexyl hydroperoxide, cyclohexanol and cyclohexanone, and then Treat the cyclohexane oxidation solution to decompose the cyclohexyl hydroperoxide in it to generate cyclohexanol and cyclohexanone, distill the unreacted cyclohexane for recycling, and obtain cyclohexanol and cyclohexanone through repeated rectification of the reaction product . [0003] The cyclohexane oxidation reactor is gener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C27/00C07C45/53C07C45/82C07C49/403C07C29/00C07C29/80C07C35/08B01J19/24B01J10/00
CPCB01J10/002B01J19/246C07C29/00C07C29/80C07C45/53C07C45/82C07C49/403C07C35/08
Inventor 周小文肖泽威刘洪武黎树根邓琼韩娟
Owner CHINA PETROLEUM & CHEM CORP
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